Synthesis of 2-alkyl-chroman-4-ones <i>via</i> cascade alkylation–dechlorination of 3-chlorochromones
作者:Shunyao Li、Lanfei Zhang、Qian He、Xiaofei Zhang、Chunhao Yang
DOI:10.1039/d1ob00463h
日期:——
An efficient and mild synthetic approach for 2-alkyl-substituted chroman-4-ones via zinc mediated cascade decarboxylative β-alkylation and dechlorination of 3-chlorochromones was developed.
Synthesis of Multisubstituted 2-Aminopyrroles/pyridines via Chemoselective Michael Addition/Intramolecular Cyclization Reaction
作者:Xueyu Qi、Haoyue Xiang、Qian He、Chunhao Yang
DOI:10.1021/ol5018855
日期:2014.8.15
A facile and efficient synthetic strategy to construct polysubstituted 2-aminopyrroles/pyridines was developed via chemoselective Michaeladdition/intramolecular cyclization reaction under very mild conditions. It suggested that the chemoselectivity of the process could be controlled by the leaving ability of the halides.
Substituent-Oriented Synthesis of Substituted Pyrazoles/Chromeno[3,2-<i>c</i>]pyrazoles via Sequential Reactions of Chromones/3-Chlorochromones and Tosylhydrazones
作者:Tianzi Dai、Qunyi Li、Xiaofei Zhang、Chunhao Yang
DOI:10.1021/acs.joc.9b00282
日期:2019.5.3
A facile and efficient synthetic strategy for the chemoselective synthesis of monocyclic/tricyclic-fused pyrazoles was developed, and it was oriented by different 3-position substituents (H or Cl) on the chromones. The reaction proceeded in a one-pot sequential way with a broad substrate scope and moderate to excellent yields.
Electrochemical C-H Halogenations of Enaminones and Electron-Rich Arenes with Sodium Halide (NaX) as Halogen Source for the Synthesis of 3-Halochromones and Haloarenes
作者:Yan Lin、Jun Jin、Chaoli Wang、Jie-Ping Wan、Yunyun Liu
DOI:10.1021/acs.joc.1c01347
日期:2021.9.3
Rastogi,M.K. et al., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1979, vol. 17, p. 34 - 36